一种测量岩石声波速度和衰减谱的技术

A TECHNIQUE FOR MEASURING ULTRASONIC VELOCITY AND ATTENU ATION SPECTRA

提出了一种实验室测量岩石声波速度和衰减谱的技术 ,可直接比较来自岩样顶界面的反射波和穿透岩样的透射波。通过对这两个波的频谱分析 ,并考虑了漫射的耗散修正 ,从而给出了连续的声波速度和衰减谱。这种技术可应用于高温高压的测量环境 ,并可测量相对松散的岩石。

A technique for measuring ultrasonic velocity and attenuation spectra in rocks is developed, by modifying the ultrasonic pulse technique introduced into rocks. Using this measuring technique, the reflected wave from the nearest interface between buffer and rock sample and transmitted wave are analyzed. By Fourier transformation of these two wave forms and correction of diffraction effects, the continuous wave velocity and attenuation spectra are finally obtained. This measuring technique is available for measurement of relatively loose rocks at high pressure.